/**
 * Copyright (C) 2010-2013 Alibaba Group Holding Limited
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.alibaba.rocketmq.client.impl.producer;

import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;

import com.alibaba.rocketmq.common.message.MessageQueue;

/**
 * @author shijia.wxr<vintage.wang@gmail.com>
 * @since 2013-7-24
 */
public class TopicPublishInfo {
	private boolean orderTopic = false;
	private boolean haveTopicRouterInfo = false;
	private List<MessageQueue> messageQueueList = new ArrayList<MessageQueue>();
	private AtomicInteger sendWhichQueue = new AtomicInteger(0);

	public boolean isOrderTopic() {
		return orderTopic;
	}

	public boolean ok() {
		return null != this.messageQueueList && !this.messageQueueList.isEmpty();
	}

	public void setOrderTopic(boolean orderTopic) {
		this.orderTopic = orderTopic;
	}

	public List<MessageQueue> getMessageQueueList() {
		return messageQueueList;
	}

	public void setMessageQueueList(List<MessageQueue> messageQueueList) {
		this.messageQueueList = messageQueueList;
	}

	public AtomicInteger getSendWhichQueue() {
		return sendWhichQueue;
	}

	public void setSendWhichQueue(AtomicInteger sendWhichQueue) {
		this.sendWhichQueue = sendWhichQueue;
	}

	public boolean isHaveTopicRouterInfo() {
		return haveTopicRouterInfo;
	}

	public void setHaveTopicRouterInfo(boolean haveTopicRouterInfo) {
		this.haveTopicRouterInfo = haveTopicRouterInfo;
	}

	public MessageQueue selectOneMessageQueue(final String lastBrokerName) {
		// 选择上一次发送消息使用的MessageQueue对象后面的一个与上次不同BrokerName的MessageQueue对象；
		if (lastBrokerName != null) {
			int index = this.sendWhichQueue.getAndIncrement();
			for (int i = 0; i < this.messageQueueList.size(); i++) {
				int pos = Math.abs(index++) % this.messageQueueList.size();
				MessageQueue mq = this.messageQueueList.get(pos);
				if (!mq.getBrokerName().equals(lastBrokerName)) {
					return mq;
				}
			}

			return null;
		} else {
			int index = this.sendWhichQueue.getAndIncrement();
			int pos = Math.abs(index) % this.messageQueueList.size();
			return this.messageQueueList.get(pos);
		}
	}

	@Override
	public String toString() {
		return "TopicPublishInfo [orderTopic=" + orderTopic + ", messageQueueList=" + messageQueueList + ", sendWhichQueue=" + sendWhichQueue + ", haveTopicRouterInfo=" + haveTopicRouterInfo + "]";
	}
}
